The act of exchanging some item of value for a given controlled substance (or cash to be used in the purchase thereof), as carried out by an addict of that substance when an otherwise exhaustive search has failed to yield the funds necessary to support his habit. The quantity of drugs received for the object of a cluck tends be very small in relationship to the item's perceived market value. This discrepancy can be attributed to the efforts of the person receiving the cluck to capitalize on his knowledge that the clucker has reached a state of desperation, in which he is liable to forego any attachment to material possessions, as well as any remaining vestige of common sense (often to the point of inevitable regret), in exchange for the opportunity to satiate his physical cravings for even the shortest duration.

After having recognized his stolen tools at a pawn shop, Ernest was crushed when he learned that they had been clucked to the shop by "some tweaker" matching the description of his deviot stepson.

a drug addict who doesn't possess the monetary means to support their habit. A "cluck" will often try to scrounge drugs, or small amounts of money to buy drugs, from anyone they know. When they engage in this behavior, the resemble chickens that cluck, peck, and scratch for any morsel of food they can find.

That sorry-ass cluck tried to borrow the change out of the ashtray in my car so he can get high.